Gluten content (ng GIP/g stool) in patients’ stool samples taken before, during, and after gluten challenge, measured by iVYLISA GIP assay. Gluten consumption per day was assessed by number of cookies eaten, taking into account the content of gluten in them, eaten between the visits by patient divided by number of days between the visits (median 1.99 [interquartile range, 1.74 - 2.91] g/d). LLoQ, lower limit of quantification; ULoQ, upper limit of quantification.